Combining a nicotine patch with an 'as you need it' nicotine lozenge or gum could be the best way to help smokers give up the habit, a new study has found.

Since it's considerably less harmful to get nicotine through a gum, patch, or a nasal spray than through tobacco, some doctors permit long-term use of these products.

Sprays and inhalers are available by prescription only, and it's important to see your doctor before buying the patch and gum over the counter.